You should be able to implement clone(), you just can't have the @Override annotation on it.
mmoossen wrote: > hi Paul! > > thanks for the insight! > but would it make more sense to have that method throwing by default > an UnsupportedOperationException or something similar so that people > that override that method can compile their classes? > (btw, i now that you should not use the clone() pattern, but this is a > legacy class i can not change) > > issue created: > http://code.google.com/p/google-web-toolkit/issues/detail?id=4972 > > regards, > Michael > > On May 25, 2:56 pm, Paul Robinson <ukcue...@gmail.com> wrote: > >> GWT does not emulate the clone() method on Object, so when you compile >> client-side code there is no method for your clone() to override. >> >> Paul >> >> >> >> mmoossen wrote: >> >>> hi Sri! >>> >>> i thought it was something like that but: >>> - i am using java 1.6 >>> - clone() is a method in Object and not in the interfac, and >>> - as said, eclipse wants that annotation (if not i get a warning) and >>> i get an error only when compiling client code. >>> >>> thanks anyhow >>> Michael >>> >>> On May 25, 12:40 pm, Sripathi Krishnan <sripathi.krish...@gmail.com> >>> wrote: >>> >>>> I think it is the javac compiler failing, not GWTC. Also, I'd guess you are >>>> using JDK 1.5. >>>> >>>> In JDK 1.5, @Override annotation cannot be applied to methods that >>>> implement >>>> an interface; they can only be applied to a method that overrides a method >>>> from a class. In your case, the clone method is defined in an interface, >>>> and >>>> you are implementing it, not overriding it .. and hence the error. >>>> >>>> Java 6 onwards, you can apply the @Override annotation to methods that >>>> implement an interface.. so you won't get this warning. Strangely, using >>>> Java 6 compiler with source="1.5" does not trigger this error. >>>> >>>> Finally, eclipse is the third culprit. It automatically puts in those >>>> annotations, and I haven't yet figured out a way to tell it "don't put >>>> those >>>> annotations when I am implementing an interface".. >>>> >>>> --Sri >>>> >>>> On 25 May 2010 15:49, mmoossen <mmoos...@gmail.com> wrote: >>>> >>>>> Dear all, >>>>> >>>>> I have a serializable object that overrides the Object.clone() method >>>>> and implements the cloneable interface. >>>>> and i have the problem that eclipse (and me too) wants to have the >>>>> Override annotation but while compiling the GWT compiler fails with >>>>> following error message >>>>> >>>>> [java][ERROR] Line 175: The method clone() of type XXX must override >>>>> or implement a supertype method >>>>> >>>>> which sounds pretty much like a bug in the GWT compiler to me... i >>>>> mean, why does the GWT compiler care about those annotations? and more >>>>> over, why does it *FAIL*. >>>>> >>>>> could somebody explain the issue to me? >>>>> >>>>> thanks >>>>> Michael >>>>> >> -- >> You received this message because you are subscribed to the Google Groups >> "Google Web Toolkit" group. >> To post to this group, send email to google-web-tool...@googlegroups.com. >> To unsubscribe from this group, send email to >> google-web-toolkit+unsubscr...@googlegroups.com. >> For more options, visit this group >> athttp://groups.google.com/group/google-web-toolkit?hl=en. >> > > -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to google-web-tool...@googlegroups.com. To unsubscribe from this group, send email to google-web-toolkit+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
